function ScrollableTable (tableEl, tableHeight, tableWidth) {

   this.initIEengine = function () {

      this.containerEl.style.overflowY = 'auto';
      if (this.tableEl.parentElement.clientHeight - this.tableEl.offsetHeight < 0) {
         this.tableEl.style.width = this.newWidth - this.scrollWidth +'px';
      } else {
         this.containerEl.style.overflowY = 'hidden';
         this.tableEl.style.width = this.newWidth +'px';
      }

      if (this.thead) {
         var trs = this.thead.getElementsByTagName('tr');
         for (x=0; x<trs.length; x++) {
            trs[x].style.position ='relative';
            trs[x].style.setExpression("top",  "this.parentElement.parentElement.parentElement.scrollTop + 'px'");
         }
      }

      if (this.tfoot) {
         var trs = this.tfoot.getElementsByTagName('tr');
         for (x=0; x<trs.length; x++) {
            trs[x].style.position ='relative';
            trs[x].style.setExpression("bottom",  "(this.parentElement.parentElement.offsetHeight - this.parentElement.parentElement.parentElement.clientHeight - this.parentElement.parentElement.parentElement.scrollTop) + 'px'");
         }
      }

      eval("window.attachEvent('onresize', function () { document.getElementById('" + this.tableEl.id + "').style.visibility = 'hidden'; document.getElementById('" + this.tableEl.id + "').style.visibility = 'visible'; } )");
   };


   this.initFFengine = function () {
      this.containerEl.style.overflow = 'hidden';
      this.tableEl.style.width = this.newWidth + 'px';

      var headHeight = (this.thead) ? this.thead.clientHeight : 0;
      var footHeight = (this.tfoot) ? this.tfoot.clientHeight : 0;
      var bodyHeight = this.tbody.clientHeight;
      var trs = this.tbody.getElementsByTagName('tr');
      if (bodyHeight >= (this.newHeight - (headHeight + footHeight))) {
         this.tbody.style.overflow = '-moz-scrollbars-vertical';
         for (x=0; x<trs.length; x++) {
            var tds = trs[x].getElementsByTagName('td');
            tds[tds.length-1].style.paddingRight += this.scrollWidth + 'px';
         }
      } else {
         this.tbody.style.overflow = '-moz-scrollbars-none';
      }

      var cellSpacing = (this.tableEl.offsetHeight - (this.tbody.clientHeight + headHeight + footHeight)) / 4;
      this.tbody.style.height = (this.newHeight - (headHeight + cellSpacing * 2) - (footHeight + cellSpacing * 2)) + 'px';

   };

   this.tableEl = tableEl;
   this.scrollWidth = 16;

   this.originalHeight = this.tableEl.clientHeight;
   this.originalWidth = this.tableEl.clientWidth;

   this.newHeight = parseInt(tableHeight);
   this.newWidth = tableWidth ? parseInt(tableWidth) : this.originalWidth;

   this.tableEl.style.height = 'auto';
   this.tableEl.removeAttribute('height');

   this.containerEl = this.tableEl.parentNode.insertBefore(document.createElement('div'), this.tableEl);
   this.containerEl.appendChild(this.tableEl);
   this.containerEl.style.height = this.newHeight + 'px';
   this.containerEl.style.width = this.newWidth + 'px';


   var thead = this.tableEl.getElementsByTagName('thead');
   this.thead = (thead[0]) ? thead[0] : null;

   var tfoot = this.tableEl.getElementsByTagName('tfoot');
   this.tfoot = (tfoot[0]) ? tfoot[0] : null;

   var tbody = this.tableEl.getElementsByTagName('tbody');
   this.tbody = (tbody[0]) ? tbody[0] : null;

   if (!this.tbody) return;

   if (document.all && document.getElementById && !window.opera) this.initIEengine();
   if (!document.all && document.getElementById && !window.opera) this.initFFengine();


}


